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1、不同品種海棠對高溫脅迫的生理響應(yīng)-園林不同品種海棠對高溫脅迫的生理響應(yīng)doi:10.13360/j.issn.1000-8101.2015.04.007中圖分類號:S718.43劉春風(fēng)1,謝寅峰2*,張往祥2(1.江蘇農(nóng)林職業(yè)技術(shù)學(xué)院風(fēng)景園林系,江蘇句容212400;2.南京林業(yè)大學(xué))摘要:為了解觀賞海棠對高溫的適應(yīng)性,以歐美觀賞海棠8個品種為材料,研究其在田間自然高溫條件下的生理適應(yīng)機(jī)理。結(jié)果表明:高溫脅迫下,隨著溫度的升高,8個海棠品種的膜透性增大,丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性、過氧化氫(H2O2)含量、脯氨酸(Pro)含量升高;可溶性蛋白含量先升高后下降。
2、相對電導(dǎo)率、MDA含量、SOD活性、Pro含量、可溶性蛋白含量可以作為鑒定海棠品種的耐熱性生理指標(biāo)。8個海棠品種均能在試驗地安全越夏,耐熱性由強(qiáng)到弱排列順序為‘Strawberry’‘Abundance’‘Robinson’‘Radiant’‘Adams’‘Sentinel’‘PinkSpire’‘Royalty’。耐熱性較強(qiáng)的品種為‘Strawberry’、‘Abundance’和‘Robinson’;耐熱性中等的品種為‘Radiant’、‘Sentinel’和‘Adams’;耐熱性較弱的品種為‘PinkSpire’和‘Royalty’。關(guān)鍵詞:海棠;嫁接苗;高溫脅迫;生理生化指標(biāo)
3、收稿日期:2014-07-22修回日期:2015-05-09基金項目:江蘇省農(nóng)業(yè)自主創(chuàng)新項目(CX[12]2043);江蘇省科技廳農(nóng)業(yè)科技支撐項目(BE2012351);江蘇省科技支撐計劃(BE2014407)。作者簡介:劉春風(fēng)(1970-),女,講師,主要從事園林植物栽培研究工作。通信作者:謝寅峰,男,副教授。Email:[emailprotected]Physiologicalresponseofdifferentcrabapplevarietiestohightemperaturestress∥LIUChunfeng,XIEYinfeng,ZHANGWangxiangAbst
4、ract:Inordertolearntheadaptabilityofvariouscrabapplevarietiestohightemperaturestress,weresearchedthephysiologicalresponseofgraftingseedlingsofeightcrabapplevarietiestohightemperaturestressunderthehotfieldconditions.Resultsshowedthathightemperaturestressincreasedthemembranepermeability,theconte
5、ntofMDA,H2O2,ProandtheactivityofSOD,thecontentofsolubleproteinincreasedinitiallyandthendeclinedwiththeincreasingoftemperatureunderhightemperaturestress.Therefore,wearguedthattherelativeconductivity,thecontentofMDA,solubleprotein,ProandtheactivityofSODcouldbeusedasindicestodetecttheheatresistanc
6、eofcrabapple.Eightcrabapplevarieties,whichweresafeinthesummerexperimentalfield,wererankedasfollows:‘Strawberry’‘Abundance’‘Robinson’‘Radiant’‘Adams’‘Sentinel’‘PinkSpire’‘Royalty’.Themostheattolerantcrabapplevarietieswere‘Strawberry’,‘Abundance’and‘Robinson’,themediumheattolerantvarietieswere‘
7、Radiant’,‘Sentinel’and‘Adams’,theweakheattolerantvarietieswere‘PinkSpire’and‘Royalty’.Keywords:crabapple;graftingseedling;hightemperaturestress;physicalandbiochemicalindexFirstauthor’saddress:DepartmentofLandscapeArchitecture,Jia